feat: 数据处理向导新增模型配置步骤

StepId 新增 model 步骤，DataProcessCreateView 增加模型选择与生成参数编排，各选项面板与样式适配新步骤流程，回归脚本补充断言。

frontend/src/views/data-process/create/data-process-create.scss

@@ -37,7 +37,7 @@
   display: flex;
   align-items: center;
   justify-content: space-between;
-  max-width: 860px;
+  max-width: 1040px;
   margin: 0 auto;
   padding: 0 20px;
 }
@@ -45,11 +45,7 @@
 .step-item {
   display: flex;
   align-items: center;
-  flex: 1;
-
-  &:first-child {
-    flex: 0;
-  }
+  flex: none;
 }
 
 .step-connector {
@@ -60,14 +56,14 @@
   transition: background-color 0.3s;
 }
 
-.step-item.is-completed .step-connector,
-.step-item.is-active .step-connector {
+.step-connector.is-active {
   background-color: #5146e5;
 }
 
 .step-node {
   display: flex;
   align-items: center;
+  flex-shrink: 0;
   gap: 10px;
 }
 
@@ -149,6 +145,30 @@
   min-width: 160px;
 }
 
+@media (max-width: 1100px) {
+  .custom-wizard-steps {
+    padding: 0;
+  }
+
+  .step-connector {
+    margin: 0 8px;
+  }
+
+  .step-node {
+    gap: 7px;
+  }
+
+  .step-title {
+    display: none;
+  }
+
+  .step-item.is-active .step-title {
+    display: block;
+    font-size: 12px;
+    white-space: nowrap;
+  }
+}
+
 @media (max-width: 760px) {
   .wizard-main {
     padding: 24px 20px;
@@ -168,9 +188,7 @@
 
   .step-title {
     max-width: 72px;
-    font-size: 12px;
     line-height: 1.35;
-    white-space: normal;
   }
 
   .wizard-footer {